Feather 32u4 Bluefruit LE ATmega32u4 Bluetooth BLE

This is the Adafruit Feather 32u4 Bluefruit – our take on an ‘all-in-one’ Arduino-compatible + Bluetooth Low Energy with built in USB and battery charging. Its an Adafruit Feather 32u4 with a BTLE module, ready to rock. Bluetooth Low Energy is the hottest new low-power, 2.4GHz spectrum wireless protocol. In particular, its the only wireless protocol that you can use with iOS without needing special certification and it’s supported by all modern smart phones. This makes it excellent for use in portable projects that will make use of an iOS or Android phone or tablet. It also is supported in Mac OS X and Windows 8+.
At the Feather 32u4’s heart is at ATmega32u4 clocked at 8 MHz and at 3.3V logic, a chip setup we’ve had tons of experience with as it’s the same as the Flora. This chip has 32K of flash and 2K of RAM, with built in USB so not only does it have a USB-to-Serial program & debug capability built in with no need for an FTDI-like chip, it can also act like a mouse, keyboard, USB MIDI device, etc.
Key features

Measures 2.0″ x 0.9″ x 0.28″ (51mm x 23mm x 8mm) without headers soldered in
Light as a feather – 5.7 grams
ATmega32u4 @ 8MHz with 3.3V logic/power
3.3V regulator with 500mA peak current output
USB native support, comes with USB bootloader and serial port debugging
You also get tons of pins – 20 GPIO pins
Hardware Serial, hardware I2C, hardware SPI support
7 x PWM pins
10 x analog inputs
Built in 100mA lipoly charger with charging status indicator LED
Pin #13 red LED for general purpose blinking
Power/enable pin
4 mounting holes
Reset button

Resources
Guide

FAQs:

Q: What microcontroller does the Feather 32u4 Bluefruit LE use?
A: The Feather 32u4 Bluefruit LE uses an ATmega32u4 microcontroller, which is compatible with the Arduino IDE.
Q: What Bluetooth capabilities does the Feather 32u4 Bluefruit LE offer?
A: The Feather 32u4 Bluefruit LE supports Bluetooth Low Energy (BLE), enabling wireless communication with various devices like smartphones, tablets, and other BLE-enabled boards.
Q: Can the Feather 32u4 Bluefruit LE be powered by a battery?
A: Yes, the Feather 32u4 Bluefruit LE has a built-in connector for 3.7V LiPo batteries and includes a charging circuit for convenient recharging.
Q: What software libraries are available for using the Bluefruit LE module?
A: Adafruit provides the Arduino BluefruitLE library, simplifying the process of using the BLE features of the board.
Q: How do I update the firmware on the Bluefruit LE module?
A: You can easily update the firmware using the Bluefruit LE Connect app available for iOS and Android devices.